Semtech have added a family of very sensitive proximity function devices to their market leading ultra-low power capacitive touch sensors platform. The SX863x ICs offer 10cm proximity sensing in a plug-and-play solution with field-programmable parameters for faster time-to-market. The SX863x family integrates all the functional blocks necessary for touch sensing and proximity sensing in a tiny footprint, requiring only one small external capacitor. This simplifies the PCB design and reduces the overall solution BOM cost. The high level of integration, advanced features of the SX863x platform, coupled with ultra-low power consumption and extreme sensitivity, make these ICs ideal for a wide range of capacitive sensing applications.

• Complete 8 to 12 Sensors Capacitive Touch Controllers for Buttons, Slider and/or Wheel
  • Pre-configured for 4 to 6 Buttons, Slider and/or Wheel
  • 8 LED Drivers with Individual Intensity, Fading Control and Autolight Mode
  • 256 steps PWM Linear and Logarithmic control
• Proximity Sensing up to several centimeters
• High Resolution Capacitive Sensing
  • Up to 100pF of Offset Capacitance Compensation at Full Sensitivity
  • Capable of Sensing through Overlay Materials up to 5mm thick
• Extremely Low Power (SX8639 shown)
  • 8uA (typ) in Sleep Mode
  • 80uA (typ) in Doze Mode (Scanning Period 195ms)
  • 175uA (typ) in Active Mode (Scanning Period 30ms)
• Programmable Scanning Period from 15ms to 1500ms
• Auto Offset Compensation
  • Eliminates False Triggers due to Environmental Factors (Temperature, Humidity)
  • Initiated on Power-up and Configurable Intervals
• Multi-Time In-Field Programmable Firmware Parameters for Ultimate Flexibility
  • On-chip user programmable memory for fast, self contained start-up
• "Smart" Wake-up Sequence for Easy Activation from Doze
• No External Components per Sensor Input
• Internal Clock Requires No External Components
• Differential Sensor Sampling for Reduced EMI
• 400 KHz Fast-Mode I²C Interface with Interrupt
• -40°C to +85°C Operation